Writing had always been one of my strengths, but it was challenging to take that initial step past the high school, five-paragraph essay form that constricted my ideas for so long. Moving past this form, however, has greatly opened my mind. My thoughts are now able to be more complex because I have learned how to sustain a logical argument in an organized manner. My writing has become increasingly more concise and I no longer have room for added "fluff" or "padding." Another improvement is my ability to point out multiple complexities within a text, instead of sticking to one-sided arguments in my papers. Furthermore, learning how to find peer reviewed journal articles and order books through interlibrary loan has significantly widened the scope of my research, which has lead to more scholarly papers with credible references. My writing is so much more interesting than it used to be.
Searching for evidence of critical thinking in discourse has roots in a definition of critical thinking put forth by Kuhn (1991),  which places more emphasis on the social nature of discussion and knowledge construction. There is limited research on the role of social experience in critical thinking development, but there is some evidence to suggest it is an important factor. For example, research has shown that 3- to 4-year-old children can discern, to some extent, the differential creditability  and expertise  of individuals. Further evidence for the impact of social experience on the development of critical thinking skills comes from work that found that 6- to 7-year-olds from China have similar levels of skepticism to 10- and 11-year-olds in the United States.  If the development of critical thinking skills was solely due to maturation, it is unlikely we would see such dramatic differences across cultures.